Valve spool



FIG. 1 is a perspective view of a valve spool, showing my new design,

FIG. 2 is a side elevational view thereof,

FIG. 3 is an end elevational view thereof, the opposite end being the same as the end shown;

FIG. 4 is a cross sectional view taken on line 4--4 of FIG. 2;

FIG. 5 is a cross sectional view taken on line 5--5 of FIG. 2;

FIG. 6 is a perspective view of a modified form of the valve spool shown in FIG. 1, wherein the difference resides in the radially extending slots;

FIG. 7 is a side elevational view of FIG. 6;

FIG. 8 is an end elevational view of FIG. 6, the opposite end being the same as the end shown;

FIG. 9 is a cross sectional view taken on line 9--9 of FIG. 7; and

FIG. 10 is a cross sectional view taken on line 10--10 of FIG. 7. 

The ornamental design for a valve spool, substantially as shown and described. 